为解决高碳Fe-20Mn-3Cu-1.3C TWIP钢凝固组织中易形成显微疏松、损害合金的力学性能的问题,研究了在相同热轧温度下,改变轧制变形总量对合金微孔缺陷的消除及拉伸力学性能的影响.研究表明：通过热轧变形可以有效地减少Fe-20Mn-3Cu-1.3C TWIP钢的微孔缺陷,提高组织致密度;随着热轧变形量的增加,合金的综合力学性能显著提高,当热轧变形量达到91%时,该合金中的微孔面密度由固溶态的1.67%降低至0.71%,抗拉强度达到1223.7 MPa,延伸率达到86.8%,强塑积高达106217.2 MPa.%,比未热轧变形处理提高了78.3%,显示出优异的综合力学性能,表明消除微孔缺陷是充分发挥其高强韧性的关键.
To eliminate the easily formed micropore in the solidification structure,which severely deteriorates the mechanical properties of high carbon Fe-20Mn-3Cu-1.3C TWIP steel,the effect of different hot rolling reduction at the same deformation temperature on micropore elimination and tensile mechanical properties was studied.The results indicate that hot rolling deformation can remove micropore effectively and make the microstructure much denser.The comprehensive mechanical properties are greatly enhanced with the increasing of hot rolling reduction.When the hot rolling reduction comes to 91%,the area density of micropore in solution state decreases from 1.67% to 0.71%,the tensile strength and elongation rate reaches 1223.7 MPa and 86.8%,respectively,and the strength-plasticity product achieves 106217.2 MPa·% which is about 78.3% higher than that of non-hot rolled steel.This shows that micropore elimination is the key factor to improve high strength and toughness of Fe-20Mn-3.0Cu-1.3C TWIP steel.
参考文献
| [1] | Georg FROMMEYER;Udo BRUX;Peter NEUMANN .Supra-Ductile and High-Strength Manganese-TRIP/TWIP Steels for High Energy Absorption Purposes[J].ISIJ International,2003(3):438-446. |
| [2] | Grassel O.;Frommeyer G.;Meyer LW.;Kruger L. .High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development - properties - application[J].International Journal of Plasticity,2000(10/11):1391-1409. |
| [3] | 米振莉,唐荻,严玲,郭锦.高强度高塑性TWIP钢的开发研究[J].钢铁,2005(01):58-60. |
| [4] | 周小芬,符仁钰,李麟.Fe24Mn0.5C形变孪晶诱发塑性钢的显微组织和力学性能[J].机械工程材料,2009(05):22-25. |
| [5] | 温鸿英,朱定一,王明杰,乔卫,廖琳.碳含量对新型Fe-Ni-Mn-Si-C系TWIP钢组织和力学性能的影响[J].钢铁,2010(06):74-78. |
| [6] | 王书晗,刘振宇,王国栋,梁高飞.热处理工艺对TWIP钢组织性能的影响[J].东北大学学报（自然科学版）,2008(09):1283-1286. |
| [7] | Z.L. Mi,D. Tang,Y.J. Dai,H.Q. Wang,S.S. Li.INFLUENCE OF COLD ROLLING REDUCTION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TWIP STEEL[J].金属学报（英文版）,2007(06):441-447. |
| [8] | 李激光,丁亚杰,彭兴东,刘津伟.水淬工艺对TWIP钢显微组织和力学性能的影响[J].金属学报,2010(02):221-226. |
| [9] | 李慎升,米振莉,唐荻,江海涛,代永娟.退火工艺对TWIP钢显微组织的影响[J].热加工工艺,2008(18):64-66. |
| [10] | 袁朝龙,钟约先,马庆贤.材料内部孔隙性缺陷自修复过程[J].塑性工程学报,2002(02):12-16. |
| [11] | M. A. MEYERS;O. VOHRINGER;V. A. LUBARDA .THE ONSET OF TWINNING IN METALS: A CONSTITUTIVE DESCRIPTION[J].Acta materialia,2001(19):4025-4039. |
| [12] | Byun TS.;Lee EH.;Hunn JD.;Mansur LK.;Farrell K. .Strain hardening and plastic instability properties of austenitic stainless steels after proton and neutron irradiation[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2001(3):269-279. |
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